By Surendra | June 10, 2020 0 Comment 0% 10 Created by Surendra Current Electricity Quiz in English Set 1 All Important Question Answers for Electrician Related Exams 1 / 25 Whether circuit may be AC. or D.C. one following is most effective in reducing the magnitude of the current. Inductor Resistor Reactor Capacitor 2 / 25 Varistors are insulators resistors with zero temperature coefficient carbon resistors non-linear resistors 3 / 25 In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes using same supply mains length of heating element should be decreased length of heating element should be increased none of the above length of heating element has no effect on heating if water 4 / 25 Resistance of a tungsten lamp as applied voltage increases remains same none of the above increases decreases 5 / 25 The resistance of a conductor varies inversely as area of cross-section temperature length resistivity 6 / 25 All of the following are equivalent to watt except joules/sec. amperes x volts amperes/volt (amperes) ohm 7 / 25 Which one of the following does not have negative temperature co-efficient ? Rubber Paper Mica Aluminium 8 / 25 Which is the best conductor of electricity ? Carbon Copper Silver Iron 9 / 25 With rise in temperature the resistance of semi-conductors first increases and then decreases remains constant decreases increases 10 / 25 A resistance having rating 10 ohms 10 W is likely to be a carbon resistor metallic resistor variable resistor wire wound resistor 11 / 25 Resistance of a material always decreases if none of the above is correct number of free electrons available become more temperature of material is increased temperature of material is decreased 12 / 25 When electric current passes through a metallic conductor its temperature rises. This is due to collisions between conduction electrons and atoms mutual collisions between conducting electrons mutual collisions between metal atoms the release of conduction electrons from parent atoms 13 / 25 A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb the heater output will remain same decrease heater will burn out increase 14 / 25 Ohm’s law is not applicable to vacuum tubes circuits with low current densities high voltage circuits carbon resistors 15 / 25 The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms what is the resistance of the other ? 18 Q 36 Q 64 Q 48 Q 16 / 25 An electric filament bulb can be worked from A.C. supply only D.C. supply only Battery supply only All above 17 / 25 With rise in temperature the resistance of pure metals decreases remains constant first increases and then decreases increases 18 / 25 Insulating materials have the function of preventing a short circuit between conducting wires conducting very large currents storing very high currents preventing an open circuit between the voltage source and the load 19 / 25 If the efficiency of a machine is to be high what should be low ? kWh consumed Losses Input power True component of power 20 / 25 Which of the following materials has a negative temperature co-efficient of resistance? Carbon Aluminum Brass Copper 21 / 25 Which of the following statement is true both for a series and a parallel D.C. circuit? Power are additive Elements have individual currents Voltages are additive Currents are additive 22 / 25 For which of the following ‘ampere second’ could be the unit ? Charge Power Reluctance Energy 23 / 25 Electric current passing through the circuit produces magnetic effect luminous effect chemical effect thermal effect 24 / 25 Two resistors are said to be connected in series when total current equals the sum of branch currents sum of IR drops equals the applied e.m.f. both carry the same value of current same current passes in turn through both 25 / 25 Which of the following quantities remain the same in all parts of a series circuit ? Power Voltage Current Resistance कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
